Pids - Agilent Technologies 7890 Series Advanced Operation Manual

PIDs

Table 1 PIDs and frits
Application
QuickSwap
Purged splitter and Deans Switch
when using backflush
Purged splitter and Deans Switch
Headspace vial pressurization
Headspace sampling loop
Advanced Operation Manual
The behavior of a pressure control module is governed by a
set of three constants, called P (proportional), I (integral),
and D (differential).
Certain gases or special applications (such as QuickSwap,
headspace vial pressurization, or splitter and backflush
applications) require different PIDs than those provided at
the factory.
If you need to update or change the pneumatic PID values
for an application, use the utility program on the
documentation and utility DVD provided with the GC.
The table summarizes custom PID values required for
selected applications. Note that if you are updating an AUX
EPC module, you will need to change the frit for the channel
used. See also "Restrictors."
Module
AUX EPC
AUX EPC
AUX EPC
AUX EPC
PCM in backpressure
control
Flow and Pressure Modules
AUX frit Select Available PID
Values
1 ring (or brown dot) Quickswap
No color or rings Quickswap
1 ring (or brown dot) Standard
No color or rings AUX_EPC_Headspace
PCM_Headspace
2
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